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May 1 Snow Survey Results
5/12/2017
Credit:
USFS
FORT JONES, CA – The Klamath National Forest has completed the May 1 snow surveys. These measurements are a part of the statewide California Cooperative Snow Survey program (CCSS), which helps the State forecast the amount of water available for agriculture, power generation, recreation, and stream flow releases later in the year.

Snow surveys are conducted monthly during the winter and spring months (March-May). Forest Service employees travel to established sites in the headwaters of the Scott River watershed to collect information about snow accumulation in the mountains of the Klamath National Forest. Some sites are located close to Forest roads with good access, while others require hours of travel by snowshoe and/or snowmobile.
Above average snow pack was surveyed in February and March. Near average snow pack was observed in April. The May 1 snow measurements for 2017 (see results below) reveal a snowpack that is overall well above the historic average for May, and much improved compared to the last several years.
There was noticeable variability between (and within) snow courses this month that are best explained by micro-topographical features such as patches of shade. As the weather warms, shading can significantly slow melting processes, both at site and hillside scale.
The height of snow and snow water equivalent (SWE) are measured by a snow sampling tube with a cutter end that is driven through the snow pack, measuring depth. The snow core is then weighed to determine the water content SWE. The information is forwarded to the State of California, where the data is compiled with other snow depth reports and becomes part of the CCSS. See http://cdec.water.ca.gov/snow/current/snow/index.html for more information.
All news releases, including past snow survey results, are posted on the Klamath National Forest’s website at http://www.fs.usda.gov/newsarchives/klamath/newsarchive.

May 1st 2017 Snow Survey Results Scott River Sub-Basin (plus Wolford Cabin, Trinity River Sub-Basin)

Snow Course
Height of Snow
Snow Water Equivalent
Measured
Historic Average
% of Historic Average
Measured
Historic Average
% of Historic Average
Middle Boulder 1
(Established 1946 / Elevation 6600’)
76.0"
52.1”
146%
40.0"
27.4”
146%
Middle Boulder 3
(Established 1948 / Elevation 6200’)
61.0"
40.3”
151%
31.0"
20.1"
154%
Dynamite Meadow
(Established 1955 / Elevation 5700’)
19.5"
22.1”
88%
9.0”
9.8”
92%
Swampy John
(Established 1951 / Elevation 5500’)
60.0"
53.0”
113%
27.0"
25.1”
108%
Scott Mountain
(Established 1986 / Elevation 5900’)
45.0"
26.0”
173%
23.5"
21.2"
111%
Total average
134%
122%